Could you please explain a bit more in detail which differences you are referring to? Is it that GNUstep currently doesn't support the keys you are using? We already support a lot of synonyms here and it wont be hard to add the current Apple names as well. If only they wouldn't change them so often. Of the two keys you are using we currently are missing "Credits", should the text for this key replace the current GNUstep key "Authors" when displaying the about panel?